Encryption runs on your device — your file and password are never uploaded.
Add a password so only people you trust can open the file. Encryption happens on your device — your password and file never leave it.
If a PDF contains sensitive information — financial records, contracts, personal documents — adding a password means only people with that password can open it. CorePDFTools encrypts your PDF in the browser, so the unprotected file never leaves your device.
Encrypting a document on a third-party server means trusting them with the unprotected file. Because CorePDFTools encrypts locally, the original never leaves your device — which is exactly what you want for private documents. The password scrambles the file's contents so it can't be read without it.
Add a password before sharing statements, records, or anything sensitive.
Ensure only the intended recipient, with the password, can open the file.
Not by normal means — that's the point of encryption. Keep the password safe, because losing it usually means losing access.
Only if the tool encrypts locally. CorePDFTools does, so your file is never uploaded.
There's no recovery for a properly encrypted PDF. Store the password somewhere safe.
Yes — encryption happens in your mobile browser.
No — it encrypts the file so a password is required to open it; the content is unchanged.